Picture frame



FIG. 1 is a perspective view of my ornamental design for a picture frame.

FIG. 2 is a top plan view of the picture frame of FIG. 1.

FIG. 3 is a bottom plan view of the picture frame of FIG. 1.

FIG. 4 is a left side elevation view of the picture frame of FIG. 1.

FIG. 5 is a right side elevation view of the picture frame of FIG. 1.

FIG. 6 is a rear elevation view of the picture frame of FIG. 1; and,

FIG. 7 is a front elevation view of the picture frame of FIG. 1.

The broken lines shown in the drawings represent portions of the picture frame that form no part of the claimed design. 

CLAIM The ornamental design for a picture frame, as shown and described. 